Getting there from São Paulo's Guarulhos Airport

The simplest way to reach the conference neighborhood (Brooklin) is to take an "aero taxi". This should cost about $R105 (~60 USD for the 53km). "Aero taxis" have booths in the airport arrival area and typically use fixed prices, not the meter. It might be possible to save a bit of money by taking a bus from the airport to the Avenida Paulista neighborhood and then taking a taxi to Brooklin, but the complexity and extra time is probably not worth the trouble. Have your destination information written down in order to avoid confusion.